Yamaha F100B F100C Outboards Factory Service Manual, Page 173Get this manual
Shimming (F100B) Shimming
NOTE: Shimming is not required when assembling the original lower case and inner parts Shimming is required when assembling the original inner parts and new lower case Shimming is required when replacing the inner part(s)T
Pinion nut: 93 Nm (9.3 kgfm, 67 ftlb)
3Measure the distance (M4) between the shimming tool and the pinion as shownSelecting the pinion shims
1Install the drive shaft to the shimming tools
Digital caliper 4: 90890-06704 4Install the thrust bearing to the drive shaft housing 6, and then measure the housing height (M3) as shown